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Drell-Yan Production at NNLL'+NNLO Matched to Parton Showers

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arxiv 1508.01475 v1 pith:F6ZR7SIX submitted 2015-08-06 hep-ph hep-ex

Simone Alioli , Christian W. Bauer , Calvin Berggren , Frank J. Tackmann , Jonathan R. Walsh This is my paper · ORCID
classification hep-phhep-ex
keywords nnlopartondrell-yanperturbativeproductionresummationcalculationcorrections
verification ladder T0 review T1 audit T2 compute T3 formal
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abstract

We present results for Drell-Yan production from the GENEVA Monte-Carlo framework. We combine the fully-differential NNLO calculation with higher-order resummation in the 0-jettiness resolution variable. The resulting parton-level events are further combined with parton showering and hadronization provided by PYTHIA8. The 0-jettiness resummation is carried out to NNLL', which consistently incorporates all singular virtual and real NNLO corrections. It thus provides a natural perturbative connection between the NNLO calculation and the parton shower regime, including a systematic assessment of perturbative uncertainties. In this way, inclusive observables are correct to NNLO, up to small power corrections in the resolution cutoff. Furthermore, the perturbative accuracy of 0-jet-like resummation variables is significantly improved beyond the parton shower approximation. We provide comparisons with LHC measurements of Drell-Yan production at 7 TeV from ATLAS, CMS, and LHCb. As already observed in $e^+e^-$ collisions, for resummation-sensitive observables, the agreement with data is noticeably improved by using a lower value of $\alpha_s(M_Z) = 0.1135$.

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Forward citations

Cited by 4 Pith papers

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    Optimal-transport couplings are used to construct confidence intervals that reduce coverage error relative to classical quantile-based intervals, with consistency theory and data-driven hyperparameters.

  2. NNLO+PS Double Higgs boson production with top-quark mass corrections in GENEVA

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    First NNLO+parton-shower simulation of double Higgs production in GENEVA that includes approximate finite top-quark mass corrections (FTapprox), validated against MATRIX.

  3. Resumming transverse observables for NNLO+PS matching in GENEVA

    hep-ph 2025-05 conditional novelty 6.0 of 10

    A GENEVA NNLO+PS generator for b bbar H and c cbar H is built with qT resummation at N3LL and the first NLL' resummation of a transverse-measure one-jettiness.

  4. Monte Carlo Event Generators for Future Lepton Colliders

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    Reviews selected challenges in Monte Carlo event generators for future lepton colliders including electroweak corrections, initial-state radiation, beam dynamics, perturbative QCD and non-perturbative modelling.

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